Shear measurement device for contractible connecting rod driving type rock-soil aggregate

Abstract

The invention discloses a shearing measurement device for a contractible connecting rod driving type rock-soil aggregate. The in-situ mechanical property measurement device comprises a detection rod, a barrel-shaped sealing cavity, a base, a rigid hollow rod, a clamp, a connecting rod driving mechanism, an expansion board, a displacement sensor and a tension sensor, wherein the barrel-shaped sealing cavity can expand in the radial direction; one end of the sealing cavity is detachably arranged at one end of the detection rod through a jacking cap; the base is sleeved at the other end of the sealing cavity; the rigid hollow rod is sleeved in the detection rod and the sealing cavity; the clamp is arranged at one end of the hollow rod, which extends out of the base; the connecting rod driving mechanism is arranged between the base and the clamp; the expansion board is arranged on the connecting rod driving mechanism; the displacement sensor is arranged on the detection rod; and the tension sensor is used for measuring tension when the detection rod is moved in the axial direction. The contractible connecting rod driving mechanism drives the expansion board to freely expand and contract in a predrilled hole; the expansion board can contract to sink to different depths in the hole; during rotary expansion of the expansion board, the hole can be expanded and the rock-soil aggregate can be crushed; a lifting probe device can shear and damage the rock-soil aggregate; and in-situ shearing strength index test on the rock-soil aggregates at different depths can be finished.

Description

technical field [0001] The invention relates to the technical field of in-situ shear strength index testing of rock and soil bodies, in particular to a retractable connecting rod-driven in-situ mechanical property measurement device for soil-rock mixtures. Background technique [0002] The on-site test can directly test the mechanical performance index of the in-situ soil and rock body, which is very necessary for guiding engineering design and on-site safe production. [0003] At present, the in-situ test is mainly to measure the relevant mechanical parameters on the ground or at a certain depth, and most of them are suitable for the soil. The existing in-situ test results cannot reflect the real original stress state of the soil and rock, and the measurement results are often quite different from the actual ones. . [0004] In addition, because the existing in-situ test has a great influence on the disturbance of the soil, the test results cannot meet the requirements of ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a retractable connecting rod-driven soil-rock mixture shear measurement device for the problem that the in-situ test of the soil-rock body is mainly carried out on the ground or at a certain depth, which cannot truly reflect the original stress state of the soil-rock body. It can realize the in-situ shear strength index test of soil and rock bodies at different depths

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